Sentence on dark matter

Hey, guys. I'm writing a science fiction novel and would like to know if you guys think there's anything wrong with the grammar in this sentence:

"Space-time tunnels required large amounts of dark matter to stay open, and they could not be closed during the course of the mission, for it took even more of the precious material to create them from scratch."

Grammatically, it's a completely correct structure, but the "for" makes it sound pretentious and of course scientifically it sounds ridiculous since dark matter doesn't interact with anything so getting large amounts of it in one place would be impossible as far as we currently know.

Grammatically, it's a completely correct structure, but the "for" makes it sound pretentious and of course scientifically it sounds ridiculous since dark matter doesn't interact with anything so getting large amounts of it in one place would be impossible as far as we currently know.

Thanks a lot for the feedback, phinds!

I'll just ascribe that idea to the "fiction" part of "science fiction". After all, scientific knowledge is always "as far as we know". :)